Dave Folk: multi-time founder and climate-tech builder. I do the earliest-stage work: customer discovery, opportunity validation, and prototyping. I also coach founders and invest.https://davefolk.com/https://davefolk.com/musings/null-to-zero/https://davefolk.com/musings/null-to-zero/Everyone talks about zero to one. The harder, more valuable work happens before it, when the problem itself is still undefined.Thu, 28 May 2026 00:00:00 GMT